By Jeff Mason, Bart H. Meijer and David Brunnstrom WASHINGTON/BRUSSELS (Reuters) -U.S. President Donald Trump opened a new phase on Monday in the trade war he launched this year, telling partners, from powerhouse suppliers such as Japan and South Korea to minor players,

US President Donald Trump, apparently impatient with the slow progress of negotiations, on Monday slapped 25 per cent unilateral tariffs on Japan and South Korea and equal or higher import taxes on several other nations ahead of a self-imposed Wednesday deadline.

President Donald Trump on Monday set a 25% tax on goods imported from Japan and South Korea, as well as new tariff rates on a dozen other countries. Trump provided notice of the tariffs to begin